A panel of 545 observations from 1980 to 1987
A data frame containing :
identifier
year
years of schooling
years of experience (computed as age-6-school
)
wage set by collective bargaining?
a factor with levels black, hisp, other
married?
health problem?
log of hourly wage
a factor with 12 levels
a factor with 9 levels
a factor with levels rural_area, north_east, northern_central, south
total number of observations : 4360
observation : individuals
country : United States
VELL:VERB:98plm
VERB:04plm